Array ( [0] => Array ( [title] => L26A [link] => https://www.youtube.com/embed/NNzLxzqOCGg ) [1] => Array ( [title] => L26B [link] => https://www.youtube.com/embed/QrO4xviTZSo ) [2] => Array ( [title] => L26C [link] => https://www.youtube.com/embed/XS57dNYA9EA ) [3] => Array ( [title] => L26D [link] => https://www.youtube.com/embed/RVBaV2leo3M ) ) 國立清華大學開放式課程OpenCourseWare(NTHU, OCW) - 第26R講 10.1 The inner product spaces